X-Git-Url: https://git.kernel.dk/?a=blobdiff_plain;f=io_u.c;h=6290ebbc6ffda5757ac686859cffb4d17ea18e7f;hb=f24254e1d142e80dc76d1f2e316da12f6ec125ee;hp=a171ee4be8998cfd07612ea79bc6d854dbfcc3f3;hpb=1e3d53acf28f1b61222eec244a67fad42f9a060d;p=fio.git

diff --git a/io_u.c b/io_u.c
index a171ee4b..6290ebbc 100644
--- a/io_u.c
+++ b/io_u.c
@@ -6,7 +6,6 @@
 #include <assert.h>
 
 #include "fio.h"
-#include "os.h"
 
 /*
  * Change this define to play with the timeout handling
@@ -85,7 +84,7 @@ static int get_next_free_block(struct thread_data *td, struct fio_file *f,
 	*b = (i * BLOCKS_PER_MAP);
 	while ((*b) * td->o.rw_min_bs < f->real_file_size) {
 		if (f->file_map[i] != -1UL) {
-			*b += ffz(f->file_map[i]);
+			*b += fio_ffz(f->file_map[i]);
 			f->last_free_lookup = i;
 			return 0;
 		}
@@ -97,6 +96,55 @@ static int get_next_free_block(struct thread_data *td, struct fio_file *f,
 	return 1;
 }
 
+static int get_next_rand_offset(struct thread_data *td, struct fio_file *f,
+				int ddir, unsigned long long *b)
+{
+	unsigned long long max_blocks = f->io_size / td->o.min_bs[ddir];
+	unsigned long long r, rb;
+	int loops = 5;
+
+	do {
+		r = os_random_long(&td->random_state);
+		if (!max_blocks)
+			*b = 0;
+		else
+			*b = ((max_blocks - 1) * r / (unsigned long long) (RAND_MAX+1.0));
+		/*
+		 * if we are not maintaining a random map, we are done.
+		 */
+		if (td->o.norandommap)
+			return 0;
+
+		/*
+		 * calculate map offset and chec if it's free
+		 */
+		rb = *b + (f->file_offset / td->o.min_bs[ddir]);
+		if (random_map_free(td, f, rb))
+			return 0;
+
+	} while (--loops);
+
+	/*
+	 * we get here, if we didn't suceed in looking up a block. generate
+	 * a random start offset into the filemap, and find the first free
+	 * block from there.
+	 */
+	loops = 10;
+	do {
+		f->last_free_lookup = (f->num_maps - 1) * (r / (RAND_MAX+1.0));
+		if (!get_next_free_block(td, f, b))
+			return 0;
+
+		r = os_random_long(&td->random_state);
+	} while (--loops);
+
+	/*
+	 * that didn't work either, try exhaustive search from the start
+	 */
+	f->last_free_lookup = 0;
+	return get_next_free_block(td, f, b);
+}
+
 /*
  * For random io, generate a random new block and see if it's used. Repeat
  * until we find a free one. For sequential io, just return the end of
@@ -106,44 +154,20 @@ static int get_next_offset(struct thread_data *td, struct io_u *io_u)
 {
 	struct fio_file *f = io_u->file;
 	const int ddir = io_u->ddir;
-	unsigned long long b, rb;
-	long r;
-
-	if (td_random(td)) {
-		unsigned long long max_blocks = f->file_size / td->o.min_bs[ddir];
-		int loops = 5;
+	unsigned long long b;
 
-		if (td->o.ddir_nr) {
-			if (!--td->ddir_nr)
-				td->ddir_nr = td->o.ddir_nr;
-			else {
-				b = f->last_pos / td->o.min_bs[ddir];
-				goto out;
-			}
-		}
+	if (td_random(td) && (td->o.ddir_nr && !--td->ddir_nr)) {
+		td->ddir_nr = td->o.ddir_nr;
 
-		do {
-			r = os_random_long(&td->random_state);
-			if (!max_blocks)
-				b = 0;
-			else
-				b = ((max_blocks - 1) * r / (unsigned long long) (RAND_MAX+1.0));
-			if (td->o.norandommap)
-				break;
-			rb = b + (f->file_offset / td->o.min_bs[ddir]);
-			loops--;
-		} while (!random_map_free(td, f, rb) && loops);
-
-		/*
-		 * if we failed to retrieve a truly random offset within
-		 * the loops assigned, see if there are free ones left at all
-		 */
-		if (!loops && get_next_free_block(td, f, &b))
+		if (get_next_rand_offset(td, f, ddir, &b))
 			return 1;
-	} else
+	} else {
+		if (f->last_pos >= f->real_file_size)
+			return 1;
+
 		b = f->last_pos / td->o.min_bs[ddir];
+	}
 
-out:
 	io_u->offset = (b * td->o.min_bs[ddir]) + f->file_offset;
 	if (io_u->offset >= f->real_file_size)
 		return 1;
@@ -153,7 +177,6 @@ out:
 
 static unsigned int get_next_buflen(struct thread_data *td, struct io_u *io_u)
 {
-	struct fio_file *f = io_u->file;
 	const int ddir = io_u->ddir;
 	unsigned int buflen;
 	long r;
@@ -167,19 +190,6 @@ static unsigned int get_next_buflen(struct thread_data *td, struct io_u *io_u)
 			buflen = (buflen + td->o.min_bs[ddir] - 1) & ~(td->o.min_bs[ddir] - 1);
 	}
 
-	while (buflen + io_u->offset > f->real_file_size) {
-		if (buflen == td->o.min_bs[ddir]) {
-			if (!td->o.odirect) {
-				assert(io_u->offset <= f->real_file_size);
-				buflen = f->real_file_size - io_u->offset;
-				return buflen;
-			}
-			return 0;
-		}
-
-		buflen = td->o.min_bs[ddir];
-	}
-
 	return buflen;
 }
 
@@ -249,7 +259,7 @@ static enum fio_ddir get_rw_ddir(struct thread_data *td)
 			 */
 			ddir = get_rand_ddir(td);
 			max_bytes = td->this_io_bytes[ddir];
-			if (max_bytes >= (td->io_size * td->o.rwmix[ddir] / 100)) {
+			if (max_bytes >= (td->o.size * td->o.rwmix[ddir] / 100)) {
 				if (!td->rw_end_set[ddir]) {
 					td->rw_end_set[ddir] = 1;
 					memcpy(&td->rw_end[ddir], &now, sizeof(now));
@@ -275,6 +285,9 @@ void put_io_u(struct thread_data *td, struct io_u *io_u)
 	assert((io_u->flags & IO_U_F_FREE) == 0);
 	io_u->flags |= IO_U_F_FREE;
 
+	if (io_u->file)
+		put_file(td, io_u->file);
+
 	io_u->file = NULL;
 	list_del(&io_u->list);
 	list_add(&io_u->list, &td->io_u_freelist);
@@ -299,7 +312,7 @@ static int fill_io_u(struct thread_data *td, struct io_u *io_u)
 	/*
 	 * If using an iolog, grab next piece if any available.
 	 */
-	if (td->o.read_iolog)
+	if (td->o.read_iolog_file)
 		return read_iolog_get(td, io_u);
 
 	/*
@@ -309,7 +322,7 @@ static int fill_io_u(struct thread_data *td, struct io_u *io_u)
 	   !(td->io_issues[DDIR_WRITE] % td->o.fsync_blocks) &&
 	     td->io_issues[DDIR_WRITE] && should_fsync(td)) {
 		io_u->ddir = DDIR_SYNC;
-		return 0;
+		goto out;
 	}
 
 	io_u->ddir = get_rw_ddir(td);
@@ -328,12 +341,13 @@ static int fill_io_u(struct thread_data *td, struct io_u *io_u)
 	/*
 	 * mark entry before potentially trimming io_u
 	 */
-	if (!td->o.read_iolog && td_random(td) && !td->o.norandommap)
+	if (td_random(td) && !td->o.norandommap)
 		mark_random_map(td, io_u);
 
 	/*
 	 * If using a write iolog, store this entry.
 	 */
+out:
 	if (td->o.write_iolog_file)
 		write_iolog_put(td, io_u);
 
@@ -416,6 +430,8 @@ static struct fio_file *get_next_file_rand(struct thread_data *td, int goodf,
 
 		fno = (unsigned int) ((double) td->o.nr_files * (r / (RAND_MAX + 1.0)));
 		f = &td->files[fno];
+		if (f->flags & FIO_FILE_DONE)
+			continue;
 
 		if ((!goodf || (f->flags & goodf)) && !(f->flags & badf))
 			return f;
@@ -438,6 +454,11 @@ static struct fio_file *get_next_file_rr(struct thread_data *td, int goodf,
 		if (td->next_file >= td->o.nr_files)
 			td->next_file = 0;
 
+		if (f->flags & FIO_FILE_DONE) {
+			f = NULL;
+			continue;
+		}
+
 		if ((!goodf || (f->flags & goodf)) && !(f->flags & badf))
 			break;
 
@@ -453,7 +474,7 @@ static struct fio_file *get_next_file(struct thread_data *td)
 
 	assert(td->o.nr_files <= td->files_index);
 
-	if (!td->nr_open_files)
+	if (!td->nr_open_files || td->nr_done_files >= td->o.nr_files)
 		return NULL;
 
 	f = td->file_service_file;
@@ -474,6 +495,9 @@ static struct fio_file *find_next_new_file(struct thread_data *td)
 {
 	struct fio_file *f;
 
+	if (!td->nr_open_files || td->nr_done_files >= td->o.nr_files)
+		return NULL;
+
 	if (td->o.file_service_type == FIO_FSERVICE_RR)
 		f = get_next_file_rr(td, 0, FIO_FILE_OPEN);
 	else
@@ -539,15 +563,19 @@ struct io_u *get_io_u(struct thread_data *td)
 
 set_file:
 		io_u->file = f;
+		get_file(f);
 
 		if (!fill_io_u(td, io_u))
 			break;
 
 		/*
-		 * No more to do for this file, close it
+		 * td_io_close() does a put_file() as well, so no need to
+		 * do that here.
 		 */
 		io_u->file = NULL;
 		td_io_close_file(td, f);
+		f->flags |= FIO_FILE_DONE;
+		td->nr_done_files++;
 
 		/*
 		 * probably not the right place to do this, but see
@@ -565,20 +593,13 @@ set_file:
 		}
 	} while (1);
 
+	assert(io_u->file->flags & FIO_FILE_OPEN);
+
 	if (td->zone_bytes >= td->o.zone_size) {
 		td->zone_bytes = 0;
 		f->last_pos += td->o.zone_skip;
 	}
 
-	if (io_u->buflen + io_u->offset > f->real_file_size) {
-		if (td->io_ops->flags & FIO_RAWIO) {
-			put_io_u(td, io_u);
-			return NULL;
-		}
-
-		io_u->buflen = f->real_file_size - io_u->offset;
-	}
-
 	if (io_u->ddir != DDIR_SYNC) {
 		if (!io_u->buflen) {
 			put_io_u(td, io_u);
@@ -594,6 +615,7 @@ set_file:
 	/*
 	 * Set io data pointers.
 	 */
+	io_u->endpos = io_u->offset + io_u->buflen;
 out:
 	io_u->xfer_buf = io_u->buf;
 	io_u->xfer_buflen = io_u->buflen;
@@ -632,8 +654,6 @@ static void io_completed(struct thread_data *td, struct io_u *io_u,
 	assert(io_u->flags & IO_U_F_FLIGHT);
 	io_u->flags &= ~IO_U_F_FLIGHT;
 
-	put_file(td, io_u->file);
-
 	if (io_u->ddir == DDIR_SYNC) {
 		td->last_was_sync = 1;
 		return;
@@ -651,7 +671,7 @@ static void io_completed(struct thread_data *td, struct io_u *io_u,
 		td->zone_bytes += bytes;
 		td->this_io_bytes[idx] += bytes;
 
-		io_u->file->last_completed_pos = io_u->offset + io_u->buflen;
+		io_u->file->last_completed_pos = io_u->endpos;
 
 		msec = mtime_since(&io_u->issue_time, &icd->time);
 
@@ -659,13 +679,14 @@ static void io_completed(struct thread_data *td, struct io_u *io_u,
 		add_bw_sample(td, idx, &icd->time);
 		io_u_mark_latency(td, msec);
 
-		if ((td_rw(td) || td_write(td)) && idx == DDIR_WRITE)
+		if (td_write(td) && idx == DDIR_WRITE &&
+		    td->o.verify != VERIFY_NONE)
 			log_io_piece(td, io_u);
 
 		icd->bytes_done[idx] += bytes;
 
 		if (io_u->end_io) {
-			ret = io_u->end_io(io_u);
+			ret = io_u->end_io(td, io_u);
 			if (ret && !icd->error)
 				icd->error = ret;
 		}